Derek Jeter and Minka Kelly Rekindling Romance?

Five months after announcing their break-up, Derek Jeter and Minka Kelly appear to have rekindled their romance with a vacation in Paris, PEOPLE has learned.

Over the holiday weekend, the Yankee slugger, 37, and Charlie's Angels actress, 31, who were staying with friends in a boutique hotel on the Left Bank, took in some of the city's hottest tourist attractions, including Musée D'Orsay on Thursday.

On Saturday, they visited the Montmartre district, where they checked out Paris' Sacré-Coeur church. And Kelly didn't let the rainy day dampen her spirits, taking pictures of Jeter on her cell phone while sightseeing.

"They looked much in love," an observer tells PEOPLE. "They were always very, very close [and] very playful as a couple with each other."

The notoriously private couple announced their split in August after dating for three years.